The Serpent Crown is, as its name implies, a crown, which resembles a coiled, seven-headed serpent and is made of an unknown material. The resemblance is a reference to the malevolent seven headed exiled serpent demon/god "Set" to whom the crown holds a mystical link from which it draws its powers.

However use of the crown usually leads the wearer to fall under the mental domination of Set, who then has the wearer perform various tasks which would help facilitate its physical return to the Earthdimension.

The Serpent Men are depicted as a race which devoutly worships Set and are in constant conflict with the human race. As human societies developed, the Serpent Men began to falter and eventually their race dwindled when King Kull became ruler of Valusia and launched a campaign against them.[2]

Five centuries after the time of Kull, their numbers dwindling even further, a group of Serpent Men ally themselves with some human alchemists from Deviant-dominated pre-cataclysmic Lemuria to create the Serpent Crown, a device which gives them access to some of the enormous mystical power of their "god" Set. However, just as the alchemists and Serpent Men were about to exploit the power of the Crown, the Great Cataclysm occurred. This event was a worldwide natural disaster which brought about the sinking of both Atlantis and Lemuria and leads to the deaths of most of the surviving Serpent Men and the loss of the Serpent Crown for centuries.[3]

A mystical object with many similarities to the Serpent Crown – the "Cobra Crown" – is shown to have existed during the Hyborian Age that followed the Great Cataclysm.[4] A follower of Set called Thoth-Amon allies himself with some surviving Serpent Men and briefly wields this second Crown. Another receptacle of Set's vast power, the Cobra Crown also enables its wearer to control the minds of others. However, it appears that it was much inferior to the Serpent Crown as its abilities eventually burn out and it is apparently destroyed during the course of a conflict between Thoth-Amon and Conan the Barbarian.[5]

Many centuries later, the sunken city of Lemuria becomes home to a race of water-breathing humanoids called Homo mermanus. These new "Lemurians" (as distinct from the "Atlantean" Homo mermanus who settled in the sunken Atlantis) eventually uncover the Serpent Crown in the ruins of the city. The emperor of the Lemurians, Naga, dons the crown and quickly came under the influence of Set.

Naga's physical appearance is changed from exposure to the crown, his facial features coming to resemble those of a snake and his skin becoming scale-like and green (from the common blue of other Homo mermanus). He converts the Lemurian people to the worship of Set and uses its power to gain immortality, ruling over his people for centuries. Through his prolonged use of the crown the skin color and complexion of Lemuria's population also becomes green and scale-like over time.[6][7]

Naga's use of the crown came to an end when a rebel named Piscatos stole it from him as he slept. Piscatos and his allies then fled with it to Antarctica, where they develop their own civilization, now known as the "Ancients". This civilization goes on to develop telepathic powers and though they use the Crown for various purposes, they manage to largely escape Set's dominance by encasing the helmet in an unknown substance which for a time prevents Set from controlling those around it.[8]

However, the malign influence of Set eventually manifested itself, with Piscatos finally becoming a follower of the serpent god, which led him to (unwittingly) cause a landslide which ended the Ancient's civilization. The Serpent Crown apparently remained buried underneath the Antarctic ice until the twentieth century.[8]

In 1920 an Antarctic expedition, led by Captain Leonard McKenzie of the icebreakerOracle discovers some remnants of the Ancients' civilization. One of the expedition party, Paul Destine, uncovers the Serpent Crown (which is still disguised by its encasement in a protective substance). Calling it the "Helmet of Power" Destine puts the crown on his head and immediately received a vast increase of his latent psionic powers and was changed physically into a stronger and larger man then he had previously been. Destine, who is thought lost by the expedition which left without him, then uses some of the Ancient's equipment to place himself in suspended animation. Destine emerged from this state decades later, his powers further increased during his period in stasis.[9]

The crown appears in its original form, worn by Lilia Calderu, queen of the Gypsies, during the time period when Destine is in suspended animation.[10]

The Crown next appears in disguised form as the "Helmet of Power". Calling himself "Destiny," Paul Destine seeks to take over the world and comes into conflict with the son of Captain Mackenzie, Namor the Sub-Mariner. Destine continues to draw on the power of the Crown throughout the story though he is never shown to fall under the overt influence of Set, perhaps due to the protective encasement under which the Ancients had placed the Crown centuries before and (more probably) the fact that the concept of the Crown had not been fully developed by the creators yet.[11]

After Destine is defeated, Namor takes the "Helmet of Power" to Atlantis.[12] The power of the Crown manages to overcome the Ancient's protective casing, revealing its true form and allowing Set to once again convey its influence through it. This story is the first true, revealed appearance of the Crown, though it had appeared in disguised form previously and some later appearances are set chronologically before this one.

The Crown initially takes over the mind of Namor's consort, Lady Dorma, and through her the entire population of Atlantis fell under its control. Namor then dons the helmet himself and through the strength of his will subverts the influence of Set, thus freeing his people.

The Crown is stolen and returned by Lemurian agents to the possession of Naga, who it is revealed has remained immortal despite his loss of the Crown centuries earlier.[13] Namor attempts to reclaim the Crown, and both Naga and the crown are cast into an undersea chasm and thought dead and destroyed.[14]

The Crown returns, having been recovered by the rebel Atlantean Warlord Krang, who delivered it to the superhuman criminal Viper. Viper, at this point leader of the original Serpent Squad, then kidnaps the president of Roxxon Oil, Hugh Jones, and places the Crown on his head. Jones immediately falls under the mental control of Set. At the conclusion of the storyline the police and Captain America interrupt the Squad's plan and the Crown is temporarily lost to an underground sewer.[15]

The Avengers from the mainstream Marvel Universe Earth travel to the Squadron Supreme's Earth and free many of that planet's people from the dominance of the Crown, during the course of which they briefly fell under its influence themselves. The Avengers then brought the Serpent Crown from that alternate world back with them to their own Earth, eventually losing it when it was dropped into the Pacific Ocean after a battle with the Living Laser.[17]

The original Crown native to that Earth is then found by Hugh Jones, who is still under Set's control. Jones also manages to locate and retrieve the second, alternate universe Serpent Crown, which he mystically merges with the original Crown to create a new Serpent Crown, identical in appearance to the others, though now possessing the combined power of the original two Crowns.[18]

Using this power, Jones then takes control of the minds of the entire population of Washington, D.C., including most of the federal government of the United States. Jones then comes into conflict with a group of super-heroes including the Thing and the Scarlet Witch. The Scarlet Witch engages Set in a battle on the Astral Plane, which allows the Thing to snatch the Crown from Jones' head, severing his link with Set.[18] The Crown is brought to the US government energy-research facility, Project: PEGASUS, for safe-keeping.[19]

The Crown began to exert Set's influence again at Project: PEGASUS, mind controlling the staff at the complex and eventually overpowering the wills of everyone who works there. These workers then set about transporting other Serpent Crowns from alternate dimensions to the Project, finally amassing 777 such crowns which are then merged to create one giant Crown, which is to be used to facilitate Set’s return to Earth.[20]

Before this happens, however, several superheroes, including Doctor Strange, Spider-Man, the Thing, and the Scarlet Witch intervene to once again disrupt Set's plans. The superheroes use the Cosmic Cube to destroy the massive Crown and reduce it to metallic dust, and Strange casts a spell exorcising Set from the Earth dimension forever. However, with the temporary loss of many of Strange's magical talismans, the spell keeping Set's influence from Earth was greatly weakened.[20]

The Deviant priest Ghaur, a disciple of Set, and his ally, the Lemurian Llyra, attempt to engineer his return once again through the use of another giant Serpent Crown. This one, however was composed of elements that rendered it indestructible. He is briefly successful in bringing Set back to the Earth dimension, as the spirit of the exiled god animates the Crown for a short while,[21] before he was defeated by Thor, Quasar, Thing and Doctor Strange.[22] The Crown itself was pushed into an underground crevice.[23]

Later, Ian McNee recovers the crown from Nagala.[10]Nova is sent to Mars by Steve Rogers to investigate the halting of Roxxon Energy Corporation's mining operations. While fleeing from unknown assailants, he flies into an artificial mountainside, where he discovers, at the top of an ancient staircase, an artifact similar to the Serpent Crown, referred to as the "Thorn Crown". Despite warnings by Worldmind, Nova puts on the crown.[24] It is later removed by Steve Rogers and taken away by its guardian, the Archon.[25]

The Serpent Crown appears in the Avengers Assemble episode "Beneath the Surface." In this show, the Serpent Crown is shown to control the Atlantean beast Giganto. Upon one of her Atlanteans posing as a cruise passenger claiming the suitcase from Hawkeye and Black Widow (who were posing as Hydra agents on a cruise as part of their spy mission), Attuma's chief advisor Lady Zartra plans to use the Serpent Crown in order to free her group from Attuma's tyranny. Following a misunderstanding between the Avengers and Lady Zartra's group, Attuma arrives with his soldiers and uses an eel to snatch the Serpent Crown. Upon wearing the Serpent Crown, Attuma unleashes Giganto on both groups. Using a special sonic arrow, Hawkeye was able to disable the Serpent Crown's control over Giganto. When Attuma is defeated and Giganto is freed, the Serpent Crown is thrown into a deep trench. Back at Avengers Tower, Hawkeye revealed to Iron Man that he managed to retrieve the Serpent Crown so that the Avengers can hold onto it for safekeeping.